雅弄冰川年代际和年际厚度变化数据(1975-2015)

冰川厚度变化是冰川变化监测的关键参数，利用历史高分KH-9影像（1974年）、SRTM DEM数据产品 (2000年）、TanDEM-X双站干涉SAR数据（2011-2014）和SPOT-7影像（2015年）数据并分别基于光学摄影测量技术和雷达干涉测量技术制备了藏东南雅弄冰川区的多期的数字高程模型。其中，对于TanDEM-X雷达数据，在数据处理过程中对其在冰川区的几何定位误差进行了去除，同时针对KH-9 DEM中雪盖区的异常变化值进行了剔除。然后经过X波段和C波段雷达波穿透深度改正最后生成了雅弄冰川在1975-2015年期间的年代际和年际的厚度变化数据集。该数据空间分辨率为30m，可进一步用于冰川演变模型参数标定，分析冰川未来变化等方面。

Glacier thickness variation is a key parameter for glacier change monitoring. Multi-temporal digital elevation models (DEMs) of the Yalong Glacier area in the southeastern Tibetan Plateau were generated using historical high-resolution KH-9 imagery (1974), SRTM DEM products (2000), TanDEM-X bistatic interferometric SAR data (2011–2014), and SPOT-7 imagery (2015), based on optical photogrammetry and radar interferometry respectively. For the TanDEM-X radar data, geometric positioning errors in glacierized areas were corrected during data processing, while abnormal variation values in snow-covered regions of the KH-9 DEMs were removed. Subsequently, after correcting for the radar wave penetration depth of both X-band and C-band, a dataset of interdecadal and interannual glacier thickness variations for the Yalong Glacier during 1975–2015 was finally generated. This dataset has a spatial resolution of 30 m, and can be further applied to parameter calibration of glacier evolution models, future glacier change analysis and other related research.

搜集汇总

背景与挑战

背景概述

该数据集提供了藏东南雅弄冰川在1975-2015年期间的年代际和年际厚度变化数据，空间分辨率为30m，数据大小为35.64 MB，采用开放获取的共享方式。数据集基于多源高分卫星数据制备，可用于冰川演变模型参数标定和未来变化分析。